SolidColorBrush from another SolidColorBrush

if you have initial SolidColorBrush like

<SolidColorBrush x:Key="ycolor"
                         Color="green" />

you can get the color or create another SolidColorBrush and using color

<SolidColorBrush x:Key="ycolor_copy"
                 Color="{Binding Source={StaticResource ycolor}, Path=Color}" />